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Vinu Patel

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last 3 solved tasks
What 5-digit number satisfies the following requirements? 1. No zeroes; 2. First two digits are the same; 3. Fourth digit is twice the first; 4. Last digit is twice the third; 5. Sum of all digits is 18

Samuel Warren Carey

Died 20 Mar 2002 at age 90 (born 1 Nov 1911). Australian geologist who contributed a model of an expanding earth in support of Alfred Wegener's concept of moving continents. Carey's ideas were a prelude to, and replaced by, the present theory of plate tectonics.

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